HAKKO (907ESD) and SOLOMON (SL-10/30) soldering iron driver

[neslekkim]

ok, sourceforge doesn't seem to respond..

[arhi]

?!
works perfectly from here

[neslekkim]

yeah, my fault, I copied to much from the svn url and tried to use repo browser in tortoisesvn which did not work, so I tried to browse via the sourforge url, and that did not work either, so I thought SF was down.
Now the browselink works, so I saw my error with the url ;)

What did DP do with their source, is it exactly the same firmware source for both projects?

[arhi]

What did DP do with their source, is it exactly the same firmware source for both projects?

the is no DP source. they only made the trough hole pcb design

[paiano84]

I have posted my changes to arhi's code in this thread. You can find it here:
viewtopic.php?f=56&t=2457&start=495#p41587

A link to Arhi's source can be found in the first post of this thread. Just replace the two files from above into the source below and compile.

Regarding the driver going into calibration mode, it turns out this was a bug caused by the low pass filter for the temperature amplifier-- I put in the filter, arhi built his without filtering. Long story short was that firmware was checking amplifier value before it had a chance to settle, determined it was out of bounds and started the calibration routine. You can read about it here:

viewtopic.php?f=56&t=2457&start=480#p41234

Arhi made changes to the firmware to fix this issue. I take it you built the board with low pass filtering. Which firmware are you using?

Done! all is ok, but the symbols vibrate too fast. The visualization is not perfect.

[pjkim]

I am not sure what you mean by "symbols vibrate too fast." Can you describe and elaborate? Picture?

[arhi]

you used the changes that are not in svn? I will redo that changes and add them to main svn when I get some free time .. but the code from svn should be good enough

[paiano84]

I am not sure what you mean by "symbols vibrate too fast." Can you describe and elaborate? Picture?

the refresh of characters is slow,when number changes the contrast vibrates. the picture does not allows to understand..
Can i upload a video?
Is normal that a resistance of 100 ohm shows a temperature of 283 celsius?

[pjkim]

Did you adjust the two trimpots for the PTC amplifier? The instructions are in a readme somewhere in the source code. I have also described here:
http://hardwhack.blogspot.com/2012/06/s ... -iron.html

in steps 2 and 3. It adjusts the constant current source and the amplifier gain. That is as far as I got in terms of temp calibration-- I have not adjusted my temp coefficients. Close enough is close enough.

As for the flickering, have you tried adjusting the contrast and/or brightness adjustment pots? You might try taking a video, upload to youtube and give a link here.

[kind2011]

hi i want to know what is the component ic that is in smd package,thanks

[pjkim]

What smd package? The red boards (designed by Arakis and sold at Seeed Studio) are all through hole and the green one (the original design by ahri) is mostly if not entirely through hole if I am not mistaken. I can't see anything SMD in the board or photos except for his recreation of Stonehenge with SMD resistors.

[arhi]

Original board is mixed, mcu and power part are pth while analog part is smd.
The smd chip is MCP619

The DP's pcb (the one you can purchase from seeedstudio) is designed by Filip (arakis) as 100% pth and thread about it is here:
viewtopic.php?f=19&t=3475

schematic is identical, firmware is identical (there is no firmware made by dp for it, so only one firmware exist), only the board layout is different (and only DP's board you ca purchase, I never sold my boards, made only one batch and gave extras to some ppl from the forum)

The "home page" for the SID is http://sid.crsndoo.com/
it's actually a sourceforge page, follow download and get sources links to get to files

[jaromir]

Maybe I overlooked something, but... I fell like the temperature - resistance table on 9th page of this thread doesn't work for me. I bought some chinese Hakko 907 soldering irons on Ebay, but the resistance at room temperature is somewhere around 60Ohm and not about 1Ohm. I heated it with hot air gun and the resistance increased, so it is probably PTC :) The other resistance on connector (which I consider to be heating element) changes its resistance only marginally and is about 10Ohm.

Could anybody bring more light on this?

[arhi]

Maybe I overlooked something, but... I fell like the temperature - resistance table on 9th page of this thread doesn't work for me.

That is normal. Each handle has it's own table (each clone uses different RTD). That is why you have to calibrate.
The temp vs resistance curve is pretty straight between 180C (even 100C) and 450C and that is the region you want to use your iron with so you calibrate with 2 points and that's it. It's not perfectly accurate but more then enough for what it's purpose is. Below 100C the curve start to go crazy

I bought some chinese Hakko 907 soldering irons on Ebay, but the resistance at room temperature is somewhere around 60Ohm

the room temp resistance does not really help much as the curve below 100C varies hugely between clones.

Did you make the electronics? If you did select "hakko original" it might work, there are also data in there for quick and gordak iirc so try them too see what works best for you, if not you will have to calibrate your iron

look at some tables here: http://elco.crsndoo.com/wordpress/2011/ ... -lemilice/

1.7R at 27C is one table (the one in the post)
then look in comments, there is another sensor with

60R at 77.6C (I think this one is around 40R at 25C)

[jaromir]

I still have no electronics, just soldering iron, DMM and lot of confusion...
How do you do calibration? Is there some simple and repeatable process? Sorry if I ask something that was answered before, but this 41-page long thread is quite hard to follow.

Ebay-ers pretend their hakko-907 soldering iron to be compatible with hakko-936, but this one has really different T/R values http://www.auelectronics.com/forum/inde ... tml#msg512
For now it looks more like hakko-936 values than those http://elco.crsndoo.com/wordpress/2011/ ... -lemilice/